Oooooooo



2 sheets sheet 1. 0. E. HUDSON. FEED WATER HEATER.

(No Model.)

n x O 9 8 1 2 Z L p A a DU t n e t a P Y m. W aw m (No Model.) 2Sheets-Sheet 2. 0. E. HUDSON.

EEED WATER HEATER.

No. 426,123. Patented Apr. 22, 1890.

OOGOQ )OOOOOQ" Wa'inanreu'.

Nirnn STATES ATENT OFFICE.

CHARLES E. HUDSON, OF UPTON, COUNTY OF ESSEX, ENGLAND.

FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 426,123, dated April22, 1890.

Application filed March 7, 1889. Serial No. 802,366, (No model.)Patented in England September 11, 1888, No. 13,141.

To all whom it may concern.-

Be it known that 1, CHARLES EDWIN HUD- SON, engineer, a subject of theQueen of Great Britain, residing in Upton, county of Essex, England,have invented certain new and usef ul Improvements in the Constructionand Arrangement of Apparatus for Heating Feed- IVater of Steanrl-Soilersand Promoting Circulation in Same, (for which I have obtained LettersPatent in Great Britain, No. 13,1451, dated September 11, 1888;) and Ido hereby declare that the following is a full, clear, and exactdescription of the same.

My invention relates to improvements in the construction and arrangementof feedheating and. Water-circulating apparatus for steam-boilers; anditconsists, essentially, in the application, as hereinafter particularlydescribed, to the mouth of a furnace of a suitable hollow metal chamber,preferably of a circular or semicircular shape, into which thefeed-water enters and where it is heated by the incandescent fuel andwaste heat of the furnace. In combination with this water-receiver Iemploy for the greater heating of the feed-water and for the purpose ofinducing circulation in the boiler a coil or coils or other form of pipeor pipes placed in the combustion-chamber or flue or in the ash'pit, andthrough which the feechwater also passes on its passage to the boilerand is further heated to a very high temperature. Combined with theabove arrangement of water chamber and coil, or in combination only withthe hollow metal receiver at month of fu.rnace,I may employ a tankplaced at the back of fire-bars, such tank thereby taking the place ofthe ordinary bridge, into which the feed-water may be conducted from thefirst-mentioned chamher by means of suitably-arranged pipes, and fromwhence it may be distributed direct into boiler, or where the coils orpipes in combustion-chamber, flue, or ash-pit are employed it may bemade to pass through such coils or pipes before being forced into theboiler.

By this my arrangement of feed-heater many advantages are obtained,among which may be mentioned:

First. Economy as compared with feedheaters now in use by reason of thefeed heater being in accordance with this invention ar ranged andplaced, as aforesaid, around the mouth of furnace, whereby it is indirect contact with the incandescent fuel and by that means heated tosuch a temperature that the existing necessity of using steam from theboiler to aid in heating the feed-watcr is overcome.

Second. Greater efiiciency, for by this my arrangement the feed-watermay be delivered into the boiler direct from the heater, (situated inthe furnace of the boiler,) whereby the ordinary arrangement of pipes(in which condensation takes place by reduction of temperature duringthe passage of the water) is dispensed with. Further, in boilers havinga sluggish draft, or in others where a forced draft is employed, thevelocity of the gases at this portion (the front end) of furnace isslow. It will therefore readily be seen that a feed-heater situated andarranged in the above-described manner will be of the greatestefficiency.

Third. The temperature of the stoke-hole is considerably reduced byreason of the radiated heat being absorbed by my feed-heater, and thusis utilized the (at present) waste heat of furnaces.

Fourth. The apparatus is, moreover, simple in construction and notliable to get out of order. It is easy of access for cleaning purposes,suitable sludge-doors being provided, and suitable safety valves arealso fitted, while, should accident occur, it is easily shut off fromaction by means of stop-cocks and valves and the feed then carried on bythe ordinary feed-pump connections.

In order that this invention may be more easily understood, I willdescribe same with reference to the accompanying drawings.

Figure 1 is a longitudinal section of a threefurnace marine boilerfitted with my improvements. Fig. 2 is a front elevation of same, therighthand half being in section through line Y, Fig. 1. Fig. 3 is alongitudinal section of a three-furnace marine boiler, which is firedfrom both ends, and in which another arrangment of my improvements isshown, whereby one .id of boiler is utilized simply for circulation andthe other end for feedheating. Fig. f is an end elevation of same withthe rightdiand half in section.

I11 accordance with this invention I dispense with the ordinaryfurnace-fronts and their baffles, and in lieu thereof I substitute ahollow metal chamber A, fitted at mouth of each furnace. The chambers A,I make of a circular or semicircular shape, and so arrange them that theremaining necessary furnacefittings can be utilized. \Vhensemicircular,I fit said chambers A above the dead-plates, but when ofcircular form they are fitted completely around the mouth of furnaces.

The hollow metal chamber, which is essentially the feed-heater of thisinvention, may consist, conveniently, of a metal tank or box, as in Fig.1, or it may be formed of a pipe or pipes, or a combination of both tankand pipe or pipes, as in Figs. 3 and 4:, and in the case of two or morefurnaces each chamber is preferably connected with the other by pipes,such as'B.

Water is supplied from the feed-pumps, and also by automatic circulationfrom all deadpoints of boiler-bottom through suitable piping C G, fittedwith stopwa-lve D, for shutting off when required.

E, Figs. 1 and 2, is a tank or receptacle used in combination with thechamber A at mouth of furnace and placed at back of fire-bars, and intowhich, by means of pipes F, the feedwater passes from tank A. Thence itcirculates through coil G, Figs. 1 and 2, and is fed into boiler at anyconvenient or desired position, such as through the feed-check valve H.This rear tank E, for its greater protection, may, if desired, be set inbrick-work.

WVith further reference to Figs. 3 and 4:, in which the feed-heaterA inright-hand furnace is shown separate from and not in connection with thecirculating apparatus in left-hand furnace, it will readily be seen thatthe feed is taken from feed-pipe G into tank A, where it is heated, andwhence it passes through valve H into boiler.

The receptacle A in left-hand furnace,which is here shown as acombination of tank and pipe, is employed for inducing circulation only,water being taken from dead-points of boiler-bottom by pipes O, andthence circulating through receptacle A and discharged into boiler bypipe I.

What Iclaim as my invention, and desire to secure by patent, is-

1. The combination, with the furnace and the chamber A in the mouththereof, of the tank E at the back of the fire-bars, and the coils G inthe combustion-chamber, flue, or ash-pit and connected with the saidtank, substantially as shown and described.

2. The combination, with the boiler and fire-bars, of the chamber A atthe mouth of the furnace, the tank E at the back of the fire-bars, thecoils G, connected with the tank, the pipes O and C, the valve D, andthe pipe F, connecting the chamber and tank, and all arranged andoperating substantially as shown and described.

In witness whereof I have hereunto signed my name in the presence of twowitnesses.

CHARLES E. HUDSON.

Witnesses:

CHAS. A. CRooK, Gno. W. SCHEAD.

